(19)
(11) EP 3 580 244 A1

(12)

(43) Date of publication:
18.12.2019 Bulletin 2019/51

(21) Application number: 17832628.6

(22) Date of filing: 13.12.2017
(51) International Patent Classification (IPC): 
C08F 10/00(2006.01)
C08F 2/00(2006.01)
(86) International application number:
PCT/US2017/065969
(87) International publication number:
WO 2018/147931 (16.08.2018 Gazette 2018/33)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME
Designated Validation States:
MA MD TN

(30) Priority: 07.02.2017 US 201762455764 P

(71) Applicant: ExxonMobil Chemical Patents Inc.
Baytown, TX 77520 (US)

(72) Inventors:
  • SMITH, Edward, F.
    Houston, TX 77019 (US)
  • VAUGHAN, George, A.
    Houston, TX 77096 (US)
  • AWE, Mike
    Langhorne, PA 19047 (US)
  • SOLLEN, James, R.
    Plympton-Wyoming, Ontario ON 1J6 (CA)
  • COOKE, Ronald, N.
    Sarnia, Ontario N7V 3R1 (CA)
  • RAJPUT, Sateesh, K
    Sarnia, Ontario N7S 5K3 (CA)
  • ALI, Ahmed H.
    Houston, TX 77092 (US)

(74) Representative: ExxonMobil Chemical Europe Inc. 
IP Law Europe Hermeslaan 2
1831 Machelen
1831 Machelen (BE)

   


(54) PROCESSES FOR REDUCING THE LOSS OF CATALYST ACTIVITY OF A ZIEGLER-NATTA CATALYST